Bug #10654: Nil -> Rational Inconsistency

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 2.1.5p273 (2014-11-13 revision 48405) [x86_64-darwin14.0]
• Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN

[kyledecot (Kyle Decot)]

I'm not sure if this is a bug or not but there seems to be some inconsistency in creating a rational from nil.

Rational(nil) # => TypeError: can't convert nil into Rational
nil.to_r # => (1/0)

I would think that the latter would produce a TypeError.

Thoughts?

[crazymykl (Mike MacDonald)]

Current behavior is consistent with other number types:

Integer(nil) # => TypeError
nil.to_i # => 0

Calling the global function raises if the conversion is not well defined, whereas the explicit conversion method instead produces the zero (i. e. the additive identity) for that type.

[naruse (Yui NARUSE)]

• Target version deleted (2.2.0)

[jeremyevans0 (Jeremy Evans)]

• Status changed from Open to Closed